摘要：

A invention relatees toa brazing sheet product having a core sheet (1)made of an aluminium alloy, having oneor both of the surfacees of said core sheet clad with an aluminium clad layer (2) and layer (3) comprising nickel on the outeresurface of oneor both said aluminium clad layer or layer (2) charaterised in that there is a layer(4)comprising zinc or tin as a bonding layerbetween said outersurface of said aluminium clad layer or layer(2)and said layer (3)comprising nickel and wherein the aluminium clad alloy comprising, in weight precent:- Si 2 to 18 Mg up to 8.0 Zn up to 5.0 Cu up to 5.0 Mn up to 0.30 In up to 0.30 Fe up to 0.80 Sr up to 0.20 At least one element select6ed form the group consisting of ;- Bi 0.01 to 1.0 Pb 0.01 to 1.0 Li 0.01 to 1.0 Sb 0.1 to 1.0 Mg 0.2 to 2.0 Impurities each up to 0.05,total up to 0.20 balance aluminium.

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